Originally posted by etmoron
theres a mint condition 91 integra ls car for sell for 5oo bucks , if i buy it can i put the motor into my car without any headaches or do i have to mess around with wiring ?? 
IMHO, if it is a mint car with a strong engine... I would ditch the Civic and drive the Integra. Of course, this is coming from a former 92 GS owner, that car met an... untimely end. I just have a thing for those headlights.
On to the real question. You would need to update the electronics to OBD-1 specs using an OBD-1 distributor, injectors, and PR4 ECU (from a 92-93 B18A or 94-95 B18B). Other then that, it is a basic B-series bolt in.